Manera Boom Vest Thanks to its SHOTGUM foam & X10D neoprene structure, the Boom vest is super protective and comfortable at the same time. It features an anti-slip technology that keeps the vest in the right position and a harness zone without foam for the harness.Put it on like a jacket thanks to the zipper. Key Features of the Boom Vest Shot gum foam: The SHUTGOM foam is super effective thanks to its large inner aircells and its manufacture process that give unbeatable shock absorbent. Hyper stretch X10D Jersey: The quality of our X10D neoprene is not to prove anymore, with incredible stretch, durability, softness and UV resistance characteristics. Harness zone: The Kitesurf vest has a special zone with no foam panels to let the harness go around the waist without discomfort. AntiSlip an inner special: Anti-slip material is printed all around the waist of the vest, it keeps the impact vest down and prevent it from going up. Manera Boom Vest Technology Shotgum foamThanks to its large inner aircells and it’s manufacture process that gives unbeatable shock absorbant, softness and lightness abilities, the SHOTGUM foam will make our impact vest the most comfortable and effective one you’ve been trying out. Anti-slipAn inner special ANTI-SLIP material is printed all around the waist of the vest. This material is sticky but soft and flexible, it keeps the impact vest down and prevent it from going up when moving/crashing, or with the harness pulling upward. Harness zoneThe Kitesurf vest has a special zone with no foam panels to let the harness go around the waist without discomfort. This is the HARNESS ZONE. Hyper stretch - X10D neopreneThe structure of our vest is made with none other than the X10D neoprene used in our wetsuits.The quality of this neoprene is not to prove anymore, with incredible stretch, durability, softness and UV resistance characteristics. Size Chart S M L XL BODY HEIGHT 164-176 172-183 176-187 179-190 CHEST GIRTH 91-97 97-103 103-109 107-114 WAIST GIRTH 71-79 76-86 83-102 88-96 AVERAGE WEIGHT(IN KG) 64 72 80 90