Understanding the "Slash" Notation

Wetsuits are often labeled as 3/2mm, 4/3mm, or 5/4mm. The first number represents the thickness of the Torso (where core warmth is critical), and the second number represents the Limbs (where flexibility for swimming and adjusting gear is needed).

Temperature & Market Mapping:

• $2\text{mm} - 3\text{mm}$: Targeted at the "Warm Water" market ($21^\circ\text{C}-25^\circ\text{C}$). These are high-volume, high-turnover items for surf schools and tropical dive resorts.

• $5\text{mm}$: The "All-Rounder" for temperate diving ($13^\circ\text{C}-20^\circ\text{C}$). This is the bread and butter for most scuba retail shops.

• $7\text{mm}$ & Semi-Dry: For cold water enthusiasts ($10^\circ\text{C}$ and below). These suits often feature integrated hoods and ankle/wrist gaskets to prevent water exchange.

The Innovation Factor: Thermal Linings

Modern B2B buyers should look for Infrared or Graphene Linings. These advanced fabrics are laminated inside the suit to reflect body heat. A $5\text{mm}$ suit with a high-end thermal lining can often perform as well as a traditional $7\text{mm}$ suit, offering the diver better mobility—a major selling point for high-end boutique dive shops.