Most divers use "passive" insulation: Thick, fluffy material that traps air. The problem? As you descend, your dry suit compresses. That fluffy air pocket gets squeezed. By the time you hit 100 feet, your "warm" 400-gram undersuit might be as thin as a cotton t-shirt.
For divers looking to stay "hot" (warm) in extreme conditions, specialized gear like the is a standard choice.
It sounds like you're referencing a specific product or branding name: — possibly a model of dive gear, heated scuba accessory, or a thermal product under the H2O Gems brand.
"H2ogems scuba hot" refers to a vibrant, multi-colored digital patterned paper from the H2O Gems collection by Hot Off The Press. This 12" x 12" cardstock features a glossy, gem-like finish ideal for ocean-themed, aquatic, or mermaid-themed crafting projects. You can find this paper at Paper Wishes or independent craft retailers.
Here's a short report:
TNUSRB , TNFUSRC , SSC , RAILWAYS, ARMY , OTHER CENTRAL GOVT.JOB's
TNUSRB , TNFUSRC , SSC , RAILWAYS, ARMY , OTHER CENTRAL GOVT.JOB's h2ogems scuba hot
TNUSRB , TNFUSRC , SSC , RAILWAYS, ARMY , OTHER CENTRAL GOVT.JOB's Most divers use "passive" insulation: Thick, fluffy material
TNUSRB , TNFUSRC , SSC , RAILWAYS, ARMY , OTHER CENTRAL GOVT.JOB's That fluffy air pocket gets squeezed