Haven't taken my rug outdoors yet as the season to decorate my deck and evaluate how well this pad works hasn't arrived in the state of Michigan since it's only April. This pad looks like good quality and upon inspection it I'd square and consistent overall but will require me to cut to fit as my rug is round and this pad is rectangular shape. The cost to purchase 9' round pad was more money than just buying the one I did and trimming off the excess. I've used this brand of rug pads before inside the house and I've never had a problem, but I did check with Great Offer Stock if this pad is acceptable for use outdoors on my wood composite decking space and they assured me it was OK. If I find out otherwise that it crumbles, slips or doesn't work out as I expect it to I will definitely re-submit a future comment. At this point I do recommend this pad atleast for indoor use from past experience with the name brand company.