Manufactured From Synthentic Polypropylene, These Parasol Bases Can Be Used All Year Round. The Base Has A Capacity Of 7 Litres, Which Can Be Filled With Sand Or Water To Provide The Weight Needed For A Secure Hold. The Cap At The Top Of The Parasol Base Is Not Suitable For Wind Up Parasols However It Can Be Removed And The Parasol Placed Directly Into The Hole Underneath However This Will Not Provide As Secure A Hold.