Spenco Polysorb Walker/Runner Athletic Insole - Cushioning for Long

In this review the Spenco Polysorb Walker/Runner Athletic Insole is evaluated for walkers and runners who want extra cushioning without bulk. The single biggest reason to consider these insoles is the layered shock absorption: a 5/32 in Spencore layer plus a Spencore heel plug combine with lightweight polysorb polyurethane foam to reduce impact on the heel and support the arch. The fabric top has a 4-way stretch with silpure to control odor and help prevent blisters, so these insoles suit daily training and long walks where comfort and foot protection matter.

Key Features

• 4-way stretch fabric with silpure: helps reduce friction that causes blisters while actively controlling odor for longer wear between washes.
• Spencore shock layer: a 5/32 in thick Spencore material absorbs shock and impact to provide noticeable cushioning underfoot.
• Lightweight polysorb foam: provides heel cupping and contoured arch support that maintains comfort without adding excessive weight.
• Spencore heel plug: offers targeted extra cushioning in the heel to soften hard landings and reduce heel soreness on repeated strides.
• Low-profile design: fits easily into most athletic shoes without making them feel tight while still delivering supportive cushioning.

Who It's For

These insoles are best for everyday walkers, runners who prefer added heel cushioning, and anyone seeking a modest arch support combined with odor control. The construction targets users who spend hours on their feet and want a comfortable, shock-absorbing layer that fits into sneakers, walking shoes, and trainers.

Those seeking custom orthotic-level correction or very high arch support should look elsewhere, as the Polysorb design focuses on cushioning and general arch contour rather than prescription-level corrective shaping.

Pros & Cons

Pros

• Effective multi-layer shock absorption from the Spencore layer and heel plug reduces impact during walking and light running.
• Stretch fabric with silpure helps prevent blisters and controls odor for longer wear life.
• Lightweight polysorb foam gives heel cupping and a comfortable contoured arch without bulk.

Cons

• Not designed as a medical orthotic, so it may not meet needs of users requiring strong corrective support.

Specifications

Product	Polysorb Walker/Runner Athletic Insole
Brand	Spenco
Top fabric	4-way stretch with silpure
Shock layer	Spencore, 5/32 in thick
Foam	Lightweight polysorb polyurethane
Heel feature	Spencore heel plug for extra cushioning
Intended use	Walking and running cushioning and odor control

Our Verdict

The Spenco Polysorb Walker/Runner Athletic Insole is a solid choice for walkers and recreational runners who want reliable cushioning, heel impact protection, and mild arch contouring at a reasonable value. Its layered Spencore construction and polysorb foam deliver tangible comfort while the silpure-treated fabric helps keep odors and blisters at bay, making it a practical upgrade for everyday athletic shoes.

Frequently Asked Questions

Do these insoles fit in most athletic shoes?
Yes, the low-profile design fits into most sneakers and walking shoes without significantly changing the fit.

Will these provide medical-level arch support?
No, they provide contoured arch support and cushioning but are not a substitute for prescription orthotics.

How do they control odor?
The top fabric is treated with silpure, an antimicrobial finish that helps limit odor-causing bacteria.