Touted as the best of Mobby’s Shell Prime series of drysuits, the T4 incorporates the Japanese manufacturer’s innovative, light-effort, self-donning zipper design and is made of a three-layer material with flexible, elastic and durable rip-stop nylon bonded to both sides of a butyl rubber layer, which has excellent waterproofness, durability and flexibility, according to the manufacturer. Safe and secure diving is enhanced by ACT, Mobby’s original dynamic anatomical cutting technology, which applies anatomical knowledge to patterning, enabling stress-free mobility and stylish functional design. Options include leg pockets, replaceable neck and wrist seals, p-valve, p-zipper and wrist valve. Available in 36 sizes including XXS to XXXL+ for men and XXS to XXL for women, with helpful 3D LOOK AI to help one find the best size, using two smartphone photos.