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Neptune Slip-On

$75
Swellsole Neptune Slip-On - Grey - Right Side View
Neptune Slip-On facing right, close-up of breathable grey mesh upper with soft-rebound cushioning and arch support.
Neptune Slip-On men's shoe facing left, close-up of front and side showing water-friendly materials and cushioning.
Close-up of the front and inner side of the Neptune Slip-On in off grey, showing soft-rebound cushioning and arch support.
Neptune Slip-On men's grey slip-on shoe facing left, close-up side view with breathable mesh upper and cushioned sole.
Top-down view of grey Neptune Slip-On shoes for men with mesh upper, blue cushioned insoles, and anatomical arch support.
Swellsole Neptune Slip-On - Grey - Main View
Swellsole Neptune Slip-On - Grey - Underside View
Neptune Slip-On right side view showing breathable, lightweight mesh upper with memory foam sockliner and flexible sole.
Neptune Slip-On men's grey slip-on shoes facing away showing heel, soft cushioning, and arch support for beach comfort.
Size 8
$75

Neptune Slip-On

Men's Comfort Sneakers

4.4
Rated 4.4 out of 5 stars
12
$75

Neptune Slip-On

Men's Comfort Sneakers

4.4
Rated 4.4 out of 5 stars
12
$75
Size 8
Neptune Slip-On
Neptune Slip-On
$75
Free Shipping

Free Shipping

Orders $65+ ship free

Easy Returns

Easy Returns

30 days to return or exchange

Trusted Since 1984

Trusted Since 1984

10,000+ ★★★★★ reviews & decades of comfort

Neptune Slip-On

Fit Information (Based on 12 reviews )

4.4
Rated 4.4 out of 5 stars
Based on 12 reviews
Total 5 star reviews: 9
Total 4 star reviews: 1
Total 3 star reviews: 0
Total 2 star reviews: 2
Total 1 star reviews: 0
FitRated 0.0 on a scale of minus 2 to 2
WidthRated 0.0 on a scale of minus 2 to 2
ComfortRated 4.4 on a scale of 1 to 5
QualityRated 4.7 on a scale of 1 to 5
StyleRated 4.6 on a scale of 1 to 5
Select A Topic To Learn More
12 reviews
  • John
    Reviewing
    Neptune Slip-On Grey / 11
    I recommend this product
    Rated 5 out of 5 stars
    August 11, 2026
    5 Stars

    Very comfortable. Better than the olukai that i currently have . I would buy ankther pair .

    Was this helpful?
  • Gilbert M.
    Verified Buyer
    Reviewing
    Neptune Slip-On Grey / 13
    I recommend this product
    Gender Male
    Did you order your normal size? Normal size
    Rated 5 out of 5 stars
    June 17, 2026
    Great Shoes

    Really Loved your shoes, I’m sure I will be back!

    FitRated 0.0 on a scale of minus 2 to 2
    WidthRated 0.0 on a scale of minus 2 to 2
    ComfortRated 5.0 on a scale of 1 to 5
    QualityRated 5.0 on a scale of 1 to 5
    StyleRated 5.0 on a scale of 1 to 5
    Was this helpful?
  • Jim M.
    Verified Buyer
    Reviewing
    Neptune Slip-On Grey / 10
    I recommend this product
    Gender Male
    Did you order your normal size? Normal size
    Rated 5 out of 5 stars
    June 12, 2026
    Shoe reviews

    Well, your marketing proved correct. It is the most comfortable shoe, right out of the box I’ve ever worn

    FitRated 0.0 on a scale of minus 2 to 2
    WidthRated 0.0 on a scale of minus 2 to 2
    ComfortRated 5.0 on a scale of 1 to 5
    QualityRated 5.0 on a scale of 1 to 5
    StyleRated 5.0 on a scale of 1 to 5
    Was this helpful?
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Description

No laces. No delay. The SWELLsole Neptune Slip-On brings a zero-fuss fit to your daily rotation with lightweight cushioning, a breathable knit upper, and extremely cushioned insole that adapts with every step. The ultra-responsive EVA midsole keeps rebound locked in, while the collapsible heel makes getting out the door even faster. Travel days, packed schedules, or just staying light on your feet—this slip-on’s ready for all of it.
Features & Benefits

Upper

  • Crush-Back Heel
    The crush-back heel lets you easily slip the shoe on or off, giving you flexible comfort that’s perfect for travel or everyday wear.
  • Lightweight Comfort
    Ultra-light design reduces foot fatigue and keeps you comfortable all day.
  • Breathable Materials
    Breathable design helps promote airflow to keep your feet cool and comfortable.

Footbed

  • Extra Cushion
    Plush, high-impact cushioning absorbs impact with every step, delivering plush comfort and easing pressure on your feet and knees.

Product Details

  • Lightweight and breathable engineered knit upper keeps you cool and collected
  • Slip-on style makes getting in and out seamless
  • Extremely cushioned insole molds to your foot for instant, cushioned support
  • Flexible EVA outsole keeps every step light and responsive, so you stay comfortable on the go

Item: CJ8417

Material & Care
Textile + Genuine Suede (Animal-Derived)
  • Use a soft, dry cloth to remove loose dirt.
  • Mix a small amount of mild clear soap with warm water.
  • Gently clean the fabric using a soft sponge dipped in the solution.
  • Rinse the sponge with clean water and remove any remaining soap from the material.
  • Allow to air dry in the shade at room temperature.
  • For genuine leather (suede or nubuck), gently brush the surface with a soft-bristled brush to remove dirt and debris, clean nubuck or suede using a nubuck/suede-safe or leather-safe cleaner, following the product’s instructions, brush lightly in one direction to maintain the texture of the material, allow to air dry in the shade at room temperature.


    • Avoid:
  • Machine washing unless specifically stated on the product.
  • Bleach or harsh detergents.
  • Direct heat or prolonged sunlight while drying.
  • Always test any cleaning method on a small, hidden area before cleaning the entire product.

Shipping & Returns

REEF offers free shipping on all orders over $65. Returns or Exchanges are available within 30 days of your order delivery date. See returns page for more details.

Key Features:

Pair of black slip-on shoes angled right showing mesh upper, cushioned orange insole, and lightweight white sole for all-day comfort

Slip On & Go

Slip-on design makes getting out the door faster, with a clean build that keeps pace wherever you're headed.
Close-up of right-facing slip-on shoe with breathable knit upper and soft-rebound cushioned orange insole for comfort

Light On Your Feet

Breathable knit uppers and a flexible EVA outsole combine for a cushioned, barely-there feel on the move.
Top view of pair of dark slip-on shoes showing breathable knit upper and bright orange cushioned insoles for comfort

All-Day Comfort

Plush memory foam molds to your foot for all-day cushioned support.

Reviews

4.4
Rated 4.4 out of 5 stars
Based on 12 reviews
Total 5 star reviews: 9
Total 4 star reviews: 1
Total 3 star reviews: 0
Total 2 star reviews: 2
Total 1 star reviews: 0
FitRated 0.0 on a scale of minus 2 to 2
WidthRated 0.0 on a scale of minus 2 to 2
ComfortRated 4.4 on a scale of 1 to 5
QualityRated 4.7 on a scale of 1 to 5
StyleRated 4.6 on a scale of 1 to 5
Select A Topic To Learn More
12 reviews
  • John
    Reviewing
    Neptune Slip-On Grey / 11
    I recommend this product
    Rated 5 out of 5 stars
    August 11, 2026
    5 Stars

    Very comfortable. Better than the olukai that i currently have . I would buy ankther pair .

    Was this helpful?
  • Gilbert M.
    Verified Buyer
    Reviewing
    Neptune Slip-On Grey / 13
    I recommend this product
    Gender Male
    Did you order your normal size? Normal size
    Rated 5 out of 5 stars
    June 17, 2026
    Great Shoes

    Really Loved your shoes, I’m sure I will be back!

    FitRated 0.0 on a scale of minus 2 to 2
    WidthRated 0.0 on a scale of minus 2 to 2
    ComfortRated 5.0 on a scale of 1 to 5
    QualityRated 5.0 on a scale of 1 to 5
    StyleRated 5.0 on a scale of 1 to 5
    Was this helpful?
  • Jim M.
    Verified Buyer
    Reviewing
    Neptune Slip-On Grey / 10
    I recommend this product
    Gender Male
    Did you order your normal size? Normal size
    Rated 5 out of 5 stars
    June 12, 2026
    Shoe reviews

    Well, your marketing proved correct. It is the most comfortable shoe, right out of the box I’ve ever worn

    FitRated 0.0 on a scale of minus 2 to 2
    WidthRated 0.0 on a scale of minus 2 to 2
    ComfortRated 5.0 on a scale of 1 to 5
    QualityRated 5.0 on a scale of 1 to 5
    StyleRated 5.0 on a scale of 1 to 5
    Was this helpful?
Show More