Our new, neoprene-free Yulex wetsuits are made of 85% natural rubber/15% synthetic rubber by polymer content. Replacing a petroleum-based material with a plant-based one, they offer the same warmth and performance attributes as conventional stretch neoprene while reducing CO2 emissions by up to ~80% in the manufacturing process. Derived from sources that are Forest Stewardship Council'Ã…¾ certified by the Rainforest Alliance, we blend the natural rubber with chlorine-free synthetic rubber to increase ozone and UV resistance, and meet our rigorous standards for strength, stretch and durability. With an anatomical, performance-focused design that maximizes comfort and flexibility while minimizing weight, the Kids' R2 Yulex Front-Zip Full Suit is 3.5mm in the torso and thighs and 3mm in the arms and legs, lined with high-stretch and fast-drying 100% recycled polyester jersey in the arms and legs; the face fabric is an 88% recycled polyester/12% spandex blend. The floating front-zip entry features a corrosion-proof zipper and asymmetrical flap for better seal, stretch and range of motion through the chest and shoulders; unlike other designs, the Salmi zipper is fully replaceable to extend the suit's lifespan. Supratex kneepads and ankle cuffs provide excellent abrasion resistance and increased durability. All seams are triple glued, blindstitched and internally taped. Easy-access key loop included. Suggested water temperatures: 55-'Ã…â€œ60° F/13-'Ã…â€œ16° C.