The sponge is based on the highest grade DT sponge manufactured by National Rubber Co., Ltd., Japan's largest rubber manufacturer, which is used by both famous overseas and domestic brands. The outer jersey for the side gussets, crotch gussets, hip area, and back of the knees uses a super stretch jersey (relaxation jersey) developed jointly with a famous domestic textile company, offering excellent texture and elasticity. The suit's brushed lining uses a top-grade brushed material, one of Japan's finest, known for its quick-drying, athletic, and heat-retaining properties, as well as its cost performance. For semi-dry suits, an inner neck is standard equipment for more comfortable surfing. (Notes) The stretch long zipper is very delicate. When putting on or taking off the suit, please open and close it gently, ensuring the slider does not get caught in the material, to avoid putting strain on the zipper. We are committed to meticulous craftsmanship to ensure customer satisfaction. #surfing #wetsuit #semidrysuit #fullsuit #longjohn #backzip #nonzip #chestzip #longchestzip #airflameboost ML Size Details 1 Height 172 2 Weight 62 3 Neck Circumference 36 4 Shoulder Width 44 5 Chest Circumference 92 6 Waist Circumference 72 7 Hip Circumference 88 8 Back Length 67 9 Sleeve Length 75 10 Upper Arm Circumference 28 11 Elbow Circumference 24 12 Forearm Circumference 26 13 Wrist Circumference 16 14 Inseam 70 15 Knee Circumference 31 16 Calf Circumference 34 17 Ankle Circumference 21 (Notes) 1. Please understand that we cannot accept cancellations, returns, or exchanges due to customer convenience. 2. If you have any questions, please ask them before purchasing. We are closed on Saturdays, Sundays, and public holidays, so there may be a delay in our response to your questions. We appreciate your understanding. (Re-Important Notes) We kindly ask that meticulous and nervous customers refrain from purchasing. Shipping will be within 5 business days from the date of purchase, excluding Saturdays, Sundays, and public holidays. We are not responsible if the size does not fit after the suit arrives. Please purchase at your own risk.