【Note】Only Suitable for FXW Dog Playpen! 【The Original Intention】Our original intention in developing this product was to address an issue highlighted by a customer, who told us that their floors had been scratched by the rods while the pads were drying. We are very sorry for this and have instantly sought to rectify the problem. 【Efficient Solution】We have tested a variety of solutions and found the rubber sleeve to be the most efficient solution, in our opinion. The pen does not need any structural changes, which has been otherwise praised by customers. So all our previous customers can use this solution. Note: Only suitable for FXW Rollick dog playpen. 【Safety Design】We tried many sizes before we settled on the current size. It takes a little effort to put on, but after that, it is quite hard to come off by itself, which is the key point – this makes it unlikely that your pet could accidentally remove and swallow the sleeve. (Although, of course, we advise you to always supervise your pets and take appropriate precautions for their well-being) 【Indoor Use】Our data show that only 15% of our FXW family members are indoor users. For environmental protection, and to avoid this product being used incorrectly and left in the soil, we remind users that it is not necessary to buy this product for outdoor use. 【Safety Precautions】Be aware that when setting up an FXW Rollick/Instant/Aster outdoor fence on a solid surface, the stakes cannot be driven into the ground, leaving gaps between the panels that metal balls cannot fill. This can potentially trap your dog's paws if they jump. Therefore, if your dog is prone to jumping, it is advisable not to use a Rollick/Instant/Aster playpen indoors and consider choosing the HomePlus Series instead.