Invented in 1952 by UC Berkeley physicist Hugh Bradner, neoprene is a closed-cell foam rubber packed with millions of nitrogen-filled microbubbles that block heat loss underwater. From scuba tanks to freediving depths, it has been the universal insulation standard for all water sports for over 70 years. (Source: Wikipedia – Wetsuit History)

The raw, unlined foam interior grips bare skin directly, creating a near-vacuum seal that minimizes water penetration. A 3mm open-cell suit delivers insulation equivalent to a 5–7mm closed-cell suit. However, it requires a lubricant to put on and wears faster — making it the exclusive domain of Olympic and World Championship freediving competitors, not everyday diving. (Source: Neptonics, DeepBlueDiving.org)

Lined with nylon or synthetic fiber on both surfaces, closed-cell neoprene is used by the vast majority of scuba divers. The outer lining resists abrasion from tanks, equipment, and reef contact. High-performance scuba suits often incorporate Kevlar reinforcement in wear-prone areas. Easy to put on, long-lasting, and versatile — the practical choice from beginner to technical diver, scuba or freediving. (Source: WetsuitWearhouse, DeepBlueDiving.org)

Yamamoto Corporation's neoprene is derived from 99.7% calcium carbonate limestone sourced from Mt. Kurohime, Japan. Grade #40 specs: 93% nitrogen-filled closed microcells, 480–580% elongation, 99.7% water impermeability. Contains 30%+ more air bubbles than petroleum-based neoprene — delivering 30% greater warmth at the same thickness. The fabric of choice for Olympic and World Championship medalists for decades. (Source: SRFACE, Ocean Tailored, Yamamoto Corporation)

Whether scuba or freediving, every suit in the BESTDIVE lineup is crafted from authentic Yamamoto neoprene. No compromises on material. That is why champions trust BESTDIVE.