{"product_id":"ostrovit-chalk-block","title":"OstroVit Chalk Block","description":"\u003cp\u003eThe OstroVit Chalk Block is a pressed block of magnesia, better known as gym chalk, for a firmer grip during training. It suits weightlifting, pull-up bars, pole fitness, climbing-style work and any session where sweaty hands can let you down.\u003c\/p\u003e\u003ch3\u003eKey features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eSolid block of pressed magnesia\u003c\/li\u003e\n\u003cli\u003eHelps improve grip on bars, poles and handles\u003c\/li\u003e\n\u003cli\u003ePressed form does not puff out into a dusty cloud like loose chalk\u003c\/li\u003e\n\u003cli\u003eCompact size that fits easily in a gym bag\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eHow to use\u003c\/h3\u003e\u003cp\u003eBreak off or crush as much as you need into small pieces, then rub it between your palms and fingers before lifting or gripping.\u003c\/p\u003e\u003ch3\u003eWhy a block\u003c\/h3\u003e\u003cp\u003eA block lets you use only what you need, keeps the rest tidy, and is a good option for gyms that dislike loose powder spreading across the floor.\u003c\/p\u003e\u003cp\u003eAvailable in a 57g block.\u003c\/p\u003e","brand":"OstroVit","offers":[{"title":"57g","offer_id":48432215425212,"sku":"P52175","price":5.21,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0022\/4709\/8438\/files\/image_2025-10-24_68fb5b09ba708.jpg?v=1791715297","url":"https:\/\/www.ivitaminsshop.co.uk\/products\/ostrovit-chalk-block","provider":"IVitamins Shop","version":"1.0","type":"link"}