Wearing New Balance Without Socks — Keep 550s & 990s Fresh

New Balance 550s, 990s, and 574s have become the go-to sockless sneaker for the clean, chunky-sole aesthetic. But their thick foam insoles aren't immune to sweat damage. Here's how to protect them and wear them sockless indefinitely.

The New Balance renaissance turned these once-dad-shoe silhouettes into the most coveted sneakers on the market. The 550, the 990v6, the 574, the 2002R — all worn constantly, often without socks. The retro-chunky profile looks especially sharp with a clean ankle, and the low-cut collar on most NB models makes sockless wear comfortable and natural.

The challenge is that New Balance invests heavily in their insole technology — Fresh Foam, ABZORB, and ENCAP cushioning are genuinely comfortable underfoot. But all of that premium foam is also highly absorbent. Without a sweat barrier, even the best NB insole will saturate, compress, and start smelling within weeks of daily sockless wear.

Why NB Fresh Foam Still Needs Protection

New Balance Fresh Foam and ABZORB technology are excellent at cushioning — but cushioning foam is also highly porous, which means it absorbs sweat just as readily as it absorbs impact. The thicker the foam, the more sweat it can hold — and once it's saturated, it stays saturated, creating the perfect bacterial environment for persistent odor.

• Fresh Foam is highly porous — the open-cell structure that makes it comfortable also makes it an efficient sweat sponge when worn without a barrier.
• NB replacement insoles are expensive — premium models like the 990 come with premium insoles that cost $30-50 to replace. NotSocks protection is far more economical.
• The mesh lining absorbs too — once the insole saturates, sweat starts soaking into the shoe's interior mesh lining. NotSocks stops this cascade before it starts.

Frequently Asked Questions