February 14, 2017

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What causes the white ADIDAS Ultra Boost / NMD BOOST Midsole to turn yellow?


This is the process of losing an electron, or the gaining of oxygen. Some elements lose or gain electrons more easily than others. That's the only as much science as I will talk about, or you guys are going to get confused.

Basically, your BOOST midsole turns yellow because of this chemical reaction. It is a natural process that cannot be stopped.Sooner or later, it will happen no matter what you do to the shoes.

But the question is how do we stop this?

If left open to the elements, the shoe will definitely turn yellow. For soles, innovative individuals over in the US have came up with Sole Protectors that protects the sole from the elements. By covering the soles with a thin sheet of layering, it protects the shoes from water, air, dirt and more. This way, the oxidation of the shoes is slowed down considerably.

The midsole however, is a different ball game altogether. While you can use bleaching agent to whiten it up, it requires a lot of time and is quite complicated to use. The best solution would be to just paint over the yellowing BOOST with specialised paint. 

sneakerguard midsole pen paint marker white

Click HERE for more details.

SNEAKERGUARD Midsole Paint Marker is formulated specially to treat and restore yellowing BOOST midsoles, back to life using specialised paint.

  • Acrylic Based Permanent Paint, commonly used by professionals in sneaker customisation.
  • Water Proof and Durable
  • Flexible and will not track
  • Natural matte finishing that will not look unnatural
  • Easy to apply as it is in pen form
  • Pump Actions system for optimum flow control
  • Good for many pairs.
  • Cheapest in the market without compromising on quality

The marker is good for several uses, depending on the number of coats used per shoe. The paint is permanent and water-proof, which means that the color will not bleed when exposed to the rain. Additionally, when dried, the paint is flexible such that the paint will not crack when flexed.

Check out the collection of BOOST / NMD Shoelaces Slickieslaces have to offer!

Visit us at www.slickieslaces.com Singapore's and South East Asia's Premier Brand of Shoe Laces. If you have any other ideas on matching colors and would like to recommend some other laces, feel free to drop me an email. Join our Facebook Group (BOOST SG) for a community of laceswap lovers!

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Size Guide


For accuracy, please measure your own set of laces. We will not be responsible for any errors in length.


Recommended Length

NMD R1 (3 Eyelets)

80CM – 90CM (80CM for less excess lace)

NMD R2 (Primeknit)


Ultra Boost

90CM – 100CM (80CM for no-tie look) (90CM is for 1 single knot)

Ultra Boost Uncaged

80CM – 90CM (80CM for less excess lace)

Human Race



4 Eyelets – 90CM

5 Eyelets – 90CM (Very small bow)

110-120CM (Stock lace length)

NIKE Roshe

90CM – 100CM

Offwhite Presto


NIKE Vapormax



5 Pairs of Eyelets - 90CM

Yeezy Boost 350


Stan Smith



Era – 100CM
Old Skool – 120CM

SK8 HI – 140CM