Ultracore Blue Ice

Build & Quality

The Ultracore Blue Ice system by Oxballs is crafted from our exclusive Plus+Silicone blend, ensuring a smooth, velvety feel that’s both body-safe and non-toxic. This high-quality silicone is phthalate-free and designed to withstand rigorous use, making it a durable choice for intense play. The outer ridges of the Core ballstretcher are engineered for maximum stretch and grip, staying taller on your sack to provide a firm, padded squeeze. The included Axis power-ring features channel ribs that morph seamlessly with the Core’s ridges, offering enhanced squeezing power. Precise craftsmanship and thoughtful design make Ultracore a reliable, long-lasting addition to your collection.

Hardware & Fasteners

The system includes the Core ballstretcher with a flexible, ribbed rubbery Axis power-ring. The power-ring’s internal channel ribs grip the ridges of the Core, amplifying the squeezing effect. Made of our soft Plus+Silicone, the Axis ring maintains a comfortable yet firm grip during extended wear. The ring’s stretchiness allows for easy application and removal, while its durable construction ensures it stays intact under pressure. The Inner smooth tunnel of the Core wraps your sack with a medium-firm squeeze, and adding the Axis ring maximizes bag squeezing for those who want intense sensation and stretch. The entire setup is designed for easy adjustment and secure fit, with the inner hourglass shape of the Core holding it firmly in place once positioned.

Comfort & Fit

Designed for comfort and effective stretching, the Ultracore system requires minimal prep—just a little lube or spit to ease application. It's recommended to wear it after a shower or during a workout for added flexibility. To put it on, stretch the Core gently, drop your nuts through, and adjust the position for your preferred level of squeeze. The inner hourglass shape ensures the device stays put, while the soft silicone and velvety rubbery texture provide a comfortable fit, even during extended sessions. For maximum bag squeezing, slide the stretchy Axis ring over the Core’s middle ridges. The system accommodates a wide range of sizes, thanks to its flexible, high-quality silicone construction. Regular cleaning with warm, soapy water and air drying ensures longevity and hygiene. Store separately in breathable pouches or cotton socks to maintain the silicone’s integrity and softness.

Features & Specifications

• Core ballstretcher with outer ridges for maximum stretch
• Inner smooth tunnel provides medium firm squeeze
• Rib-gripping rubbery Axis power-ring enhances squeezing power
• Made from our exclusive Plus+Silicone blend—soft, smooth, and body-safe
• Channel ribs inside the Axis ring morph with the Core ridges for added grip
• Designed for intense stretch and bag squeezing
• Adjustable fit with secure hold thanks to the inner hourglass shape
• Easy to wear with minimal preparation—lube recommended