These needles are the proper size, and will not puncture the liners if properly used WARNING: Merchandise can not be returned or exchanged if liner is damaged or punctured due to inappropriate inflation or needle use A versatile liner created for different head shapes delivers comfort and steadiness Removable moisture-resistant https://riddell-speedflex-adult-l42768.ltfblog.com/29984089/about-adult-medium-speedflex