About the Weighted Plate for Performance Weighted Vest
From the product page on zelusfitness.com.
These Zelus Curved Weight Plates are designed for tactical vests like the FWV-TC. The ergonomic curve hugs your body closely, preventing discomfort and allowing freer movement during exercises. Available in three weights (5.75, 8.75, 13.75 lbs) and color-coded for quick identification. Their standard size is compatible with various tactical vests, and smooth rounded corners allow easy insertion/removal while protecting the vest's interior. Made from structural-grade steel, they are impact-resistant, corrosion-resistant, and deformation-resistant, reliably boosting your training intensity indoors or out.
Boost Training Performance: These Zelus curved weighted vest plates increase the intensity of your workouts by adding evenly distributed weight to your vest. The ergonomic shape hugs your body without digging in, letting you move freely during training
Quick & Easy Loading: These standard-sized weighted plates are compatible with a wide range of weight vests. The smooth edges make sliding the weight vest plates in quick and simple, so you can spend less time adjusting