3mm: Comfortable contoured 2mm GLIDESEAL collar with Velcro adjustment. Skin-in 3mm GLIDESEAL wrist and ankle seals Heavy-duty, color coordinated, G-lock back zipper with stainless steel slider Skin-to-skin internal sealing zipper flap Anatomically correct pattern for three dimensional fit throughout Set-in sleeve design for superior comfort and mobility Embossed inner elbow flex panels FORMTEK kneepads provide total flexibility, durability and comfort Loop at base of zipper assists donning Double glued with SECURE-LOCK construction