SMART DESIGN - Ridges are high on two sides and low in the middle, that makes the water flow together from both sides and drain into a sink quietly and easily. Simple but functional, you don’t need to do anything. Please notice the draining side is on the short edge RELIABLE MATERIAL - No BPA, food grade silicone. Ridges are designed to provide a safe, stable surface for your drying needs. If there’s little crease in item (when packaged) leads to pooled water in the center of the mat, please contact us to solve your problem! VARIETY OF USES - Can be used as the dish drying mat, heat insulating /trivet mat and the storage in fridge or freezer. The wide temperature range (-40�H~ 446�H/-40�C to 230�C) and sturdiness allows you to use it everywhere practically EASY CLEANING & STORAGE - The wide-spaced ridges on the mat makes cleaning a breeze. The mat can also be placed in the dishwasher for fast, no-hassle cleaning. And it is designed to roll up for easy storage in a cabinet or closet.