We present the Loftsails Spark III C50 RDM mast.
SPECS
| Size | IMCS | Weight |
| 340 cm | 14 | 1.8 kg |
| 370 cm | 17 | 2.1 kg |
| 400 cm | 19 | 2.25 kg |
| 430 cm | 21 | 2.5 kg |
| 460 cm | 25 | 2.9 kg |
| Size | IMCS | Weight |
| 340 cm | 14 | 1.8 kg |
| 370 cm | 17 | 2.1 kg |
| 400 cm | 19 | 2.25 kg |
| 430 cm | 21 | 2.5 kg |
| 460 cm | 25 | 2.9 kg |
| Size | EURO | Height (cm) | Weight (kg) | Chest (cm) |
|---|---|---|---|---|
| XS | 46 | 169–175 | 54–62 | 88–93 |
| S | 48 | 172–178 | 62–70 | 93–98 |
| STall | 94 | 179–184 | 65–74 | 92–98 |
| MSmall | 25 | 167–174 | 66–75 | 98–104 |
| M | 50 | 175–181 | 70–78 | 98–103 |
| MTall | 98 | 182–189 | 73–82 | 97–103 |
| L (Small) | 26 | 170–177 | 74–83 | 103–109 |
| L | 52 | 178–184 | 78–86 | 103–108 |
| LTall | 102 | 185–192 | 81–90 | 102–108 |
| XLSmall | 27 | 173–180 | 82–91 | 108–114 |
| XL | 54 | 181–187 | 86–94 | 108–113 |
| XL Tall | 106 | 188–195 | 89–98 | 107–113 |
| XXL Small | 28 | 176–183 | 90–98 | 113–119 |
| XXL | 56 | 184–190 | 94–102 | 113–118 |
| 3XL | 58 | 186–193 | 102–111 | 118–125 |
| 4XL | 60 | 187–196 | 111–120 | 125–134 |

| Size | EURO | Height (cm) | Weight (kg) | Chest (cm) |
|---|---|---|---|---|
| XXS | 32 | 155–161 | 41–49 | 76–81 |
| XS | 34 | 157–165 | 46–54 | 80–85 |
| S | 36 | 161–170 | 53–61 | 84–89 |
| M/Short (MS) | 19 | 158–167 | 60–70 | 88–93 |
| M | 38 | 166–175 | 60–69 | 88–93 |
| M/Tall (MT) | 76 | 174–185 | 64–73 | 88–93 |
| L | 40 | 170–180 | 64–75 | 92–97 |
| L/Tall (LT) | 80 | 176–190 | 72–80 | 92–97 |
| XL | 42 | 174–190 | 75–90 | 96–101 |
| XXL | 44 | 176–190 | 77–100 | 100–105 |

| Size | Height (cm) | Weight (kg) | Chest (cm) |
|---|---|---|---|
| 4 | 104–112 | 15–22 | 55–60 |
| 6 | 113–123 | 21–28 | 60–65 |
| 8 | 124–134 | 27–34 | 65–70 |
| 10 | 135–145 | 33–40 | 70–75 |
| 12 | 146–155 | 39–46 | 75–80 |
| 14 | 156–165 | 45–52 | 80–85 |
| 16 | 166–176 | 51–58 | 85–90 |

| Size (EU/cm) | Waist (cm) | Back Length | Spreader Bar Size (cm) |
|---|---|---|---|
| 46/XS | 66–76 | - | 22 |
| 48/S | 74–84 | ≤48 | 22 |
| 49/STall | 74–84 | >48 | 22 |
| 50/M | 82–92 | ≤50 | 25 |
| 50/MTall | 82–92 | >50 | 25 |
| 52/L | 90–100 | ≤52 | 28.5 |
| 52/L Tall | 90–100 | >52 | 28.5 |
| 54/XL | 98–108 | - | 32 |

| Size (EU/cm) | Waist (cm) | Back Length | Spreader Bar Size (cm) |
|---|---|---|---|
| 34/XS | 56–68 | - | 22 |
| 36/S | 66–76 | ≤ 45 | 22 |
| 72/STall | 66–76 | >45 | 22 |
| 38/M | 74–84 | ≤46 | 25 |
| 76/MTall | 74–84 | >46 | 25 |
| 40/L | 82–92 | - | 28.5 |

| Size | Waist (cm) | Spreader Bar Size (cm) |
|---|---|---|
| XS/46 | 66–76 | 22 |
| S/48 | 74–84 | 22 |
| M/50 | 82–92 | 25 |
| L/52 | 90–100 | 28.5 |
| XL/54 | 98–108 | 32 |
| XXL/56 | 106–116 | 32 |

| Spreader Bar Size (cm) | Size | Waist (cm) |
|---|---|---|
| 22 | XS/34 | 55–68 |
| 22 | S/36 | 66–76 |
| 25 | M/38 | 74–84 |
| 28.5 | L/40 | 82–92 |

| Size (EU/cm) | Size (cm) | Waist (cm) |
|---|---|---|
| S-M | 48–50 | 70–90 |
| L-XL | 52–54 | 90–110 |
| Size | Waist circumference (cm) | Age (years) |
|---|---|---|
| XXXS/104 | 50–56 | 6–9 |
| XXS/116 | 55–61 | 8–12 |
| XS/128 | 60–66 | 10–14 |
| Size (Trapeze) | Waist (cm) | Spreader Bar Width (cm) |
|---|---|---|
| XS | 66–76 | 22 |
| S | 74–84 | 22 |
| M | 82–92 | 25 |
| L | 90–100 | 28.5 |
| XL | 98–108 | 32 |
| XXL | 106–116 | 32 |
| Size Trapeze | Waist (cm) | Spreader Bar Width (cm) |
|---|---|---|
| XS | 56–68 | 22 |
| S | 66–76 | 22 |
| M | 74–84 | 25 |
| L | 82–92 | 28.5 |
| Size | Sleeve Length (cm) | Chest circumference (cm) | Waist (cm) | Lower waist circumference (cm) | Hip circumference (cm) |
|---|---|---|---|---|---|
| XS | 70–72 | 86–90 | 75–79 | 76–80 | 86–90 |
| S | 73–75 | 91–95 | 80–84 | 81–86 | 91–96 |
| M | 76–78 | 96–100 | 85–89 | 87–92 | 97–102 |
| L | 79–81 | 101–105 | 90–94 | 93–98 | 103–108 |
| XL | 82–84 | 106–110 | 95–99 | 99–104 | 109–114 |
| XXL | 85–87 | 111–115 | 100–104 | 105–110 | 115–120 |

| Size | Sleeve Length (cm) | Bust (cm) | Waist circumference (cm) | Lower waist circumference (cm) | Hip circumference (cm) |
|---|---|---|---|---|---|
| XS | 65–67 | 80–84 | 60–64 | 72–77 | 87–92 |
| S | 68–70 | 85–89 | 65–69 | 78–83 | 93–98 |
| M | 71–73 | 90–94 | 70–74 | 84–89 | 99–104 |
| L | 74–76 | 95–99 | 75–79 | 90–95 | 105–110 |
| XL | 77–79 | 100–104 | 80–84 | 96–101 | 111–116 |

| Size | Lower waist circumference (cm) | Hip circumference (cm) | Inseam (cm) |
|---|---|---|---|
| XS | 75–80 | 85–90 | 77–82 |
| S | 81–86 | 91–96 | 83–85 |
| M | 87–92 | 97–102 | 86–88 |
| L | 93–98 | 103–108 | 86–88 |
| XL | 99–104 | 109–114 | 86–88 |
| XXL | 105–110 | 115–120 | 89–91 |

| Size | Lower waist circumference (cm) | Hip circumference (cm) | Inseam (cm) |
|---|---|---|---|
| XS | 72–77 | 87–92 | 77–79 |
| S | 78–83 | 93–98 | 80–82 |
| M | 84–89 | 99–104 | 80–82 |
| L | 90–95 | 105–110 | 80–82 |
| XL | 96–101 | 111–116 | 83–85 |

| Euro (cm) | USA | UK | Approx. Foot Length (CM) |
|---|---|---|---|
| 36 | 5 | 4 | 22 |
| 37 | 6 | 5 | 23 |
| 38–39 | 7 | 6 | 24 |
| 40–41 | 8 | 7 | 25 |
| 42 | 9 | 8 | 26 |
| 43–44 | 10 | 9 | 27 |
| 45–46 | 11 | 10 | 28 |
| 47–48 | 12 | 11 | 29 |

| Size | Ankle circumference (cm) |
|---|---|
| XS | 19.5 |
| S | 20.5 |
| M | 21.5 |
| L | 22.5 |
| XL | 23.5 |
| XXL | 24.5 |

| Size | Inner circumference (cm) |
|---|---|
| XXS | 50–54 |
| XS | 52–56 |
| S | 54–58 |
| M | 56–60 |
| L | 58–61 |
| XL | 60–62 |

| Size | Head circumference (cm) |
|---|---|
| XXS | 50–54 |
| XS | 52–56 |
| S | 54–58 |
| M | 56–60 |
| L | 58–61 |
| XL | 60–62 |

| Size | Height (cm) |
|---|---|
| S | 135–175 |
| L | 165–300 |
| Size | Height (cm) | Chest (cm) |
|---|---|---|
| XS | 158–164 | 72–82 |
| S | 162–170 | 80–90 |
| M | 168–176 | 88–97 |
| L | 174–182 | 97–108 |
| XL | 180–188 | 106–116 |

| Size | EU | Height (cm) | Chest (cm) |
|---|---|---|---|
| Youth 1 | 8 | 124–134 | 46–56 |
| Youth2 | 10 | 140–154 | 56–66 |
| Youth3 | 12 | 152–166 | 66–76 |
| XS | 46 | 164–170 | 72–82 |
| S | 48 | 168–174 | 80–90 |
| M | 50 | 172–178 | 88–99 |
| L | 52 |

| Size | Head circumference (cm) |
|---|---|
| XS | 51–54 |
| S-M | 53–56 |
| M-L | 55–61 |

| Max. Board Length | Length (cm) | Width (cm) | Weight (kg) |
|---|---|---|---|
| 137×43 cm | 142 | 48 | 1 |
| 143 × 45 cm | 148 | 50 | 1.1 |
| 166 × 49 cm | 169 | 54 | 1.4 |
| Size | Max. Board Length (cm) | Max. Board Width (cm) | Length (cm) (cm) | Width (cm) (cm) | Height (cm) (cm) | Weight (kg) (kg) |
|---|---|---|---|---|---|---|
| 148 × 45 cm | 148 | 45 | 155 | 48 | 25 | 1.6 |
| Size | Max. Board Length | Length (cm) | Width (cm) | Height (cm) | Weight (kg) |
|---|---|---|---|---|---|
| 148 | 148 × 45 cm | 155 | 48 | 25 | 2.95 |
| Size | Max. Board Length (cm) | Max. Board Width (cm) | Length (cm) | Width (cm) | Weight (kg) (kg) |
|---|---|---|---|---|---|
| 8′2″ x 28.5″ | 0–254 | 0–72 | 273 | 87 | 2.6 |
| 9′0″ x 32″ | 255–275 | 73–82 | 290 | 100 | 2.9 |
| 9'5" x 33" | 276–288 | 83–84 | 300 | 100 | 3.0 |
| 9′6″ x 31″ | 289–290 | 85–79 | 303 | 91 | 3.1 |
| 10′0″ x 33″ | 291–305 | 80–84 | 320 | 98 | 3.3 |
| 10′6″ x 31″ | 306–320 | 0–79 | 333 | 91 | 3.6 |
| 11′6″ x 34″ | 231–351 | 80–86 | 364 | 102 | 3.8 |
| Size | Max. Board Length (cm) | Max. Board Width (cm) | Length (cm) | Width (cm) | Weight (kg) (kg) |
|---|---|---|---|---|---|
| 4′8″ x 23″ | 0–142 | 0–58 | 155 | 70 | 1.7 |
| 5′2″ x 25″ | 143–158 | 59–63.5 | 169 | 75 | 1.8 |
| 5′4″ x 26″ | 159–163 | 64–66 | 173 | 86 | 1.9 |
| 6′0″ x 30″ | 164–186 | 67–77 | 193 | 96 | 1.9 |
| 6′11″ x 30″ | 187–211 | 0–77 | 226 | 100 | 2.1 |
| 8′3″ x 29″ | 212–253 | 0–74 | 253 | 74 | 2.6 |
| 8′10″ x 31.5″ | 154–270 | 0–80 | 270 | 80 | 2.8 |
| Size (ft/in) | Max. Board Length (cm) | Max. Board Width (cm) | Length (cm) | Width (cm) | Weight (kg) (kg) |
|---|---|---|---|---|---|
| 12′6″ | 0-381 | 0-78 | 395 | 98 | 3.9 |
| Size | Max. Board Length (cm) | Max. Board Width (cm) | Length (cm) | Width (cm) | Height (cm) | Weight (kg) (kg) |
|---|---|---|---|---|---|---|
| 14′0″ x 26.5″ | 0-427 | 0–67 | 442 | 70 | 27 | 5.2 |
| 12'6" x 28.5" | 0–427 | 0–67 | 442 | 70 | 27.5 | 5 |
| Size (ft/in) | Max. Board Size | Length (cm) | Width (cm) | Weight (kg) |
|---|---|---|---|---|
| 5′6″ | 165 × 54 cm | 180 | 67 | 1.3 |
| 5′8″ | 173 × 53 cm | 183 | 68 | 1.35 |
| 6′0″ | 183 × 53 cm | 193 | 68 | 1.4 |
| 6′5″ | 199 × 54 cm | 209 | 69 | 1.5 |
| 6′10″ | 210 × 55 cm | 219 | 70 | 1.7 |
| Size (ft/in) | Max. Board Size | Length (cm) | Width (cm) | Height (cm) | Weight (kg) |
|---|---|---|---|---|---|
| 6′8″ | 203*60 cm | 206 | 63 | 22 | 3.4 |
| Size (ft/in) | Max. Board Size | Length (cm) | Width (cm) | Weight (kg) |
|---|---|---|---|---|
| 5′2″ | 170 × 54 cm | 174 | 68 | 1.25 |
| 5′6″ | 78 × 48.5 cm | 182 | 59 | 1.3 |
| 6′0″ | 183 × 51 cm | 190 | 61 | 1.4 |
| Max. Board Length | Length (cm) | Width (cm) | Weight (kg) | Fin Slots |
|---|---|---|---|---|
| 230×58 cm | 241 | 74 | 2 | Thruster |
| 235 × 61 cm | 250 | 75 | 2.1 | Thruster |
| 240 × 66.5 cm | 255 | 82 | 2.2 | Thruster |
| 245 × 73 cm | 255 | 90 | 2.3 | Single Fin |
| 250 × 79 cm | 263 | 93 | 2.5 | Single Fin |
| 255 × 85 cm | 267 | 100 | 2.7 | Single Fin |
| Max. Board Length | Length (cm) | Width (cm) | Weight (kg) | Fin Slots |
|---|---|---|---|---|
| 215×58 cm | 218 | 73.5 | 1.9 | Thruster |
| 230 × 63 cm | 233 | 74 | 2.1 | Thruster |
| 235 × 70 cm | 241 | 82 | 2.3 | Single Fin |
| 238 × 78 cm | 240 | 91 | 2.5 | Single Fin |
| 236 × 100 cm | 241 | 117 | 3.2 | Single Fin |
| Size | Max. Board Length (cm) (cm) | Max. Board Width (cm) (cm) | Length (cm) (cm) | Width (cm) (cm) | Height (cm) (cm) | Weight (kg) (kg) |
|---|---|---|---|---|---|---|
| 245x65 cm | 0–245 | 0–65 | 250 | 68 | 20 | 3.85 |
| 250x85 cm | 246–250 | 66–85 | 255 | 88 | 25 | 4.4 |
| Sizes | Max. Board Length (cm) | Max. board width (cm) | External bag length (cm) | External bag width (cm) | Weight (kg) |
|---|---|---|---|---|---|
| 4'6" x 21" | 0–137 | 0–53 | 147 | 62 | 1.6 |
| 4'9" x 23" | 138–145 | 54–61 | 155 | 70 | 1.7 |
| 5'3" x 26" | 146–160 | 62–66 | 169 | 75 | 1.8 |
| 5'5" x 27" | 161–165 | 67–68 | 173 | 86 | 1.9 |
| 6' 0" x 30" | 166–186 | 69–77 | 193 | 96 | 1.9 |
| 6'11" x 30" | 187–211 | 69–77 | 226 | 100 | 2.1 |
| Size | Max. board length (cm) | Max. board width (cm) | Weight (kg) |
|---|---|---|---|
| 5'5 | 0–165 | 0–48.5 | 0.5 |
| Size | Max. board length (cm) | Max. board width (cm) | Weight (kg) |
|---|---|---|---|
| 5'9 | 0–175 | 0–48 | 0.5 |
| Size | Max. Board Length (cm) | Max. Board Width (cm) | Weight (kg) |
|---|---|---|---|
| 53 | 0–160 | 0–48 | 0.6 |
| 5′4″ | 0–160 | 0–72 | 167 | 72 | 28 | 4.6 | 1 foilboard + 2 wings |
| 6′0″ | 161–185 | 0–53 | 190 | 55 | 35 | 4.6 | 1 surfboard + 4 kites |
| 6′3″ | 186–190 | 0–72 | 195 | 72 | 35 | 4.6 | 1 foilboard + 3 wings |
| 6′8″ | 191–205 | 0–72 | 208 | 72 | 35 | 5.6 | 1 foilboard + 4 wings |
| Size | Max. Board Length (cm) | Max. board width (cm) | Length (cm) | Width (cm) | Height (cm) | Weight (kg) | Luggage |
|---|---|---|---|---|---|---|---|
| 139 | 0–140 | 0–43 | 142 | 48 | 40 | 3.6 | 1 board + 4 kites |
| 152 | 141–153 | 44–47 | 155 | 48 | 40 | 3.8 | 1 board + 4 kites |
| 165 | 154–167 | 48–50 | 170 | 52 | 40 | 3.9 | 1 board + 4 kites |
| 186 | 168–186 | 51–53 | 190 | 55 | 40 | 4.1 | 1 board + 4 kites |
| Size (cm) | Max. Board Length (cm) | Max. board width (cm) | Length (cm) | Width (cm) | Height (cm) | Weight (kg) (kg) | Gear |
|---|---|---|---|---|---|---|---|
| 145 | 0–145 | 0–45 | 148 | 47 | 38 | 3.75 | 1 board + 4 kites |
| 165 | 146–164 | 46–47 | 168 | 50 | 40 | 4.15 | 1 board + 4 kites |
| Size (ft/in) (ft/in) | Max. Board Length (cm) | Max. Board Width (cm) | Length (cm) (cm) | Width (cm) (cm) | Height (cm) (cm) | Weight (kg) (kg) | Gear |
|---|---|---|---|---|---|---|---|
| 5′0″ | 0–150 | 0–69 | 157 | 72 | 28 | 4.2 | 1 board + 3 wings |
| 5′4″ | 0–160 | 0-69 | 167 | 72 | 28 | 4.6 | 1 board + 3 wings |
| 5′9″ | 0–180 | 0-69 | 187 | 72 | 35 | 5 | 2 boards + 3 wings |
| 6′3″ | 0-190 | 0-69 | 195 | 72 | 35 | 5.3 | 2 boards + 3 wings |
| 6′8″ | 0-205 | 0-69 | 208 | 72 | 35 | 5.6 | 2 boards + 3 wings |
| Gear | Size (ft/in) (ft/in) | Max. Board Length (cm) | Max. Board Width (cm) | Length (cm) (cm) | Width (cm) (cm) | Height (cm) (cm) | Weight (kg) (kg) |
|---|---|---|---|---|---|---|---|
| 1 board + 4 kites | 6′0″ | 161–185 | 0-53 | 190 | 55 | 35 | 4.6 |
| Size | Length (cm) | Width (cm) | Height (cm) | Volume (L) | Weight (kg) |
|---|---|---|---|---|---|
| 40 L | 35 | 25 | 49 | 40 | 1.02 |
| Size | Length (cm) | Width (cm) | Depth (cm) | Weight (kg) |
|---|---|---|---|---|
| 80L | 55 | 37 | 40 | 0.45 |
| Size | Length (cm) | Width (cm) | Height (cm) | Volume (L) | Weight (kg) |
|---|---|---|---|---|---|
| 90 L | 90 | 45 | 40 | 90 | 1.56 |
| Size | Length (cm) (cm) | Width (cm) (cm) | Height (cm) | Volume (L) | Weight (kg) (kg) |
|---|---|---|---|---|---|
| S | 56 | 35 | 23 | 35 | 3.12 |
| M | 64 | 37.5 | 45(+5) | 65(+10) | 4.35 |
| L | 90 | 40 | 35 | 110 | 5.15 |
Mario and the Wind Lounge team are happy to help you. Together, we’ll figure out what’s really right for you.
Feel free to fill out the contact form and tell us a little about your riding area, your riding style, and your current gear.
The more we know, the better advice we can give you. We’ll then get in touch with you personally.
Loftsails was founded in 1999 by Monty Spindler and has been one of the most unconventional windsurfing sail brands for more than two decades. Spindler develops and tests all sails in Tarifa, one of the windiest and most challenging spots in the world. What works there goes into production. What doesn’t work there never makes it to market. This isn’t a marketing promise—it’s the fundamental principle behind every Loftsails collection. Spindler publicly explains his design decisions in a video series where he directly answers questions from the community, and he personally stands behind every sail that bears his name.
Loftsails represents a clearly defined design approach that Spindler calls Wind Vision: sails that are stable, efficient, and controllable across a wide wind range without sacrificing peak performance. Specifically, this means: IPC (Integrated Profile Control) for a stable profile across the entire wind range, TekCam as the camber system for the Freerace line, and a consistent selection of materials focused on durability and profile stability. The result is sails with a distinct character: controlled, responsive, and predictable.
Loftsails covers all disciplines, from wave to PWA slalom. The Purelip and Wavescape are designed for waves and bump & jump; the Oxygen and Switchblade for freeride and freerace; the Racingblade and Formulablade for competition; and the Skyblade and Escape for Foil. In addition, there are dedicated masts in 50%, 75%, and 100% carbon, in RDM and SDM configurations, which are consistently matched to the sails.