What's the difference between a base layer and a rash vest?

The differences between a rash vest and a base layer, when you should be wearing them and why.

Breeze Women's Long Sleeve Base Layer Shirt

The Best Cold Weather Baselayers for 2022 - Backpacker

Grappz High Quality Long Sleeve Compression Shirt / Rash Guard *BUY 2 GET 10% OFF BOTH, DURABLE REINFORCED UNION STITCHING – The union stitch is one

Rashguard - Long Sleeve Athletic Compression Shirt - Base layer - By Grappz - X-Small

11 Best Men's Base Layers for Cold Weather 2024

TMA Sports Mens Compression Shirts Base Layer Athletic Gym MMA BJJ Rash Guard

The 6 Best Thermal Underwear of 2024

What to wear - Principles of layering

Base Layers vs Rash Guard (Eng.) – able2sportswear

Organic Wool/ Silk Men's Midweight Base Layer Top, Crew Neck - Little Spruce Organics

Winter Cycling Base Layer (with Collar) - for Pro Cycling

Short Sleeve Compression Base Layer in Black, Gray, and White