Trying to find a gift idea for the scuba diver in your life this holiday season? Look no further than our scuba diving holiday gift guide.

Amazon Prime Day kicks off at 3 pm EST on Monday, July 16, and it lasts a full 36 hours.

A rash guard may not be as important as a reg or BC, but it does offer protection against the sun and stinging critters, and makes it easier to get into a wetsuit.

The Spyderco Dragonfly 2 Hawkbill dive knife was a ScubaLab Testers Choice during the 2018 dive knife test.

The Seac Rip Fish dive knife was a ScubaLab Testers Choice during the 2018 dive knife test.

The Mares XR Ceramic Line Cutter was a ScubaLab Testers Choice in the cutting tools category of the during the 2018 dive knife test.

The Seac Katan dive knife was a Best Buy during the 2018 ScubaLab dive knife test.

The Aqua Lung Big Squeeze Titanium dive knife was a ScubaLab Testers Choice during the 2018 dive knife test.

This time-lapse video shows how the ScubaLab team was able to simulate a day's worth of diving during the 2018 knife test— without ever getting wet.