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The GEL-QUANTUM 360 was born in 2015 as the first ASICS shoe with 360 degrees of GEL in the midsole, the result of more than five years of development at the Institute of Sports Science in Kobe. The idea was to bring to light technology that ASICS had been using since 1986 but that had always remained hidden inside the sole. The AMP version amplifies that foundational silhouette with extra layers and volume, while this Reddish Brown Black colorway brings it to an earthy palette far removed from the usual technical whites.
Built on the 2015 model, the AMP adds overlapping panels and synthetic reinforcements that give the silhouette a more robust profile. Here, reddish brown covers most of the upper, while black takes over the side logo, tongue, and midsole, leaving the GEL ring as the only visual break in the design.
At Next Step, we offer them 100% new and authentic, with 14 calendar days for returns from the date of receipt. Fast shipping to Spain and throughout Europe.
Reddish brown with black pairs well with military green cargo trousers, dark denim, and earth-tone garments. It is the autumn option in the QUANTUM family. Discover more colorways in our ASICS GEL-Quantum 360 collection at Next Step.
Earn at least 195 Steps with this purchase Earn 195 Steps with this purchase
Why buy from Next Step
We started in Barcelona as a sneaker and streetwear store. Today we ship across Europe, and every order passes through our team's hands before it reaches you.
15,000+ products inspected
100% authenticity guaranteed
We inspect every product in our warehouse before it ships. Only what passes gets the tag.
How we verifyOwn stock + European network
What we don't have in stock, we source for you through our European supplier network, at the price you see today.
About usFast delivery
Tracked shipping across the EU and 14 days for exchanges and returns.
How pre-orders workSecure payment
Pay now, in 3 interest-free installments or in 4 installments. Payment methods
The questions we’re asked most often before buying, answered in 30 seconds. Need more details? Check the full FAQ or ask our AI assistant on WhatsApp, available 24/7.
Preparation: in-stock items leave the warehouse within 24–48 business hours. We source pre-orders for you within 1–10 business days.
Shipping (UPS, with tracking number):
Do you need it by a specific date? Ask us on WhatsApp before buying, and we’ll confirm whether it will arrive on time.
Free shipping in mainland Spain on orders of €99.99 or more (€6.95 on smaller orders). Mainland Portugal: €11.95. Rest of the European Union: from €14.95. Balearic Islands: €9.95. Canary Islands, Ceuta and Melilla: special rate (taxes not included).
We ship across the European Union (not to Switzerland, the United Kingdom, Norway or Iceland). You’ll see the exact amount at checkout after entering your address, before paying. Free shipping doesn’t apply to large Pop Mart figures.
Yes. All our products are new and 100% authentic. Every item is inspected by our team before shipping and gets the Next Step Verified tag, confirming it has been verified and shipped directly by us.
Plus, manufacturing defects are covered for 14 calendar days after delivery, and Swatch watches come with the official manufacturer’s warranty.
You have 14 calendar days from receiving your order to request an exchange or return.
Changing sizes is easy: request the return from your account under My orders, indicate the size you want in the comments, and as soon as we receive the item, we’ll send you the new size at no shipping cost. There’s no need to place a new order.
We’ll provide the return label via WhatsApp (SEUR or UPS in mainland Spain; UPS for all other destinations). Its cost is the standard rate for your area, for example €6.95 in mainland Spain. The item must be unused and have the Next Step Verified tag intact.
For each product, you’ll find the model’s size guide. Always use the European size (EU) as your reference: it’s the most consistent across brands.
Not sure between two sizes? Message us on WhatsApp with your height, weight, and usual size: our assistant will recommend the right size in seconds, at any time.
If a product is marked as Pre-order, it isn’t in our warehouse right now, but we source it specifically for you through our supplier network within 1–10 business days and keep you updated by email every step of the way.
If your size isn’t listed on the product page, message us: we’ll check whether we can get it and let you know.
Visa, Mastercard, Maestro, American Express, UnionPay, Apple Pay, Google Pay, Shop Pay, and PayPal, as well as local methods such as iDEAL, Bancontact, Blik, and Wero.
You can also pay in installments with Klarna (subject to availability in your country). All payments are processed securely through Shopify.
Our smart assistant answers on WhatsApp 24/7: delivery times, sizes, stock, shipping, exchanges… And if you need anything else, a member of our team takes over in the same conversation.
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