From the manufacturer

Back based on the demand of our most technically proficient climbers, the Boostic is our stiffest high-performance shoe, delivering unmatched edging power and precision for the tiniest features. With a V-Tension Rand, and a full-length Vibram® XS Edge outsole, the Boostic provides ultimate support and micro-edging precision for your most technical projects.

Features

• Dual Velcro Strap: Dual velcro strap closure is super secure and wraps the foot in support and performance, dialing up the precision and edging power. 
• Rubber Toe Patch: A recessed rubber toe patch tucks under the rand rubber, providing durable protection and hooking ability. 

Specifications

• Size Options: 35 - 45 (half sizes)
• Upper: Microsuede + Eco leather
• Last: FZ - highly downturned, highly asymmetric
• Primary Material: Leather
• Weight Reference: 245g (1/2 pair, size 41)
• Midsole: Flexan 1.0
• Profile: Highly downturned
• Waterproof/Breathable: PFAS Compliant
• Outsole: Vibram® XS Edge 4mm
• Symmetry: Highly asymmetric