潜水服是一种服装，通常由泡沫氯丁橡胶制作而成，主要是给冲浪者、潜水员、冲浪板运动员、皮划艇运动员和其他从事水上运动的人穿着，以提供保温、耐磨性和浮力。潜水服的绝缘性能取决于泡沫材料的气体封闭效果，以降低传热能力；气泡也给潜水服低密度，在水里提供浮力。

流行潜水衣的温水层通常给皮肤提供很小的保温效果。

休·班德勒，是一名加州大学伯克利分校的物理学家，他在1952年发明了现代潜水服。在1950年代，潜水衣演变为相对脆弱的泡沫氯丁橡胶作为制作材料，后来，更严格的材料如尼龙、氨纶莱卡或其他材料的潜水服是由胶布粘合制作，以帮助保持防水、减少冲洗、更换内衣和身体之间的隔水功能。进一步改进的潜水服，把脖子、手腕和脚踝都要包裹住。

Diving helmets are worn mainly by professional divers engaged in surface supplied diving, though many models can be adapted for use with scuba equipment.

The helmet seals the whole of the diver's head from the water, allows the diver to see clearly underwater, provides the diver with breathing gas, protects the diver's head when doing heavy or dangerous work, and usually provides voice communications with the surface (and possibly other divers). If a helmeted diver becomes unconscious but is still breathing, the helmet will remain in place and continue to deliver breathing gas until the diver can be rescued. In contrast, the scuba regulator typically used by recreational divers must be held in the mouth, otherwise it can fall out of an unconscious diver's mouth and result in drowning (this does not apply to a full face mask which also continues to serve air if the diver is unconscious).