What the product is & key features
According to the listing on Jumia Nigeria: “Estelin 5D Hyaluronic Acid Moisturizing Toner, Vitamin C Niacinamide Toner 400 ml”.

Key marketed ingredients:
“5D Hyaluronic Acid complex” — meaning five molecular weights/sizes of hyaluronic acid for multi-layer hydration.
Vitamin C (Ascorbic Acid) for brightening, reducing dark spots and boosting glow.
Niacinamide (Vitamin B3) for improving skin tone/texture, strengthening skin barrier and reducing redness.

From another listing: The description says: “Estelin 5D HA Moisturizing Toner … deep, lasting moisture … Vitamin C and Niacinamide to even tone and add glow. Panthenol and Allantoin calm and help repair.”
Size: 400 ml — a large volume for a toner.
Ingredient & formulation considerations

The “5D Hyaluronic Acid” claim is interesting: using multiple molecular weights can help hyaluronic acid both stay on surface and penetrate to some depth — good for hydration + plumping.

Vitamin C + Niacinamide in the same formula: these can complement each other (brightening + barrier support) though formulation/pH matters for vitamin C stability.

Additional calming/repairing agents (Panthenol, Allantoin) are a nice bonus for sensitive or stressed skin.

As a toner (vs. serum) it likely has a lighter texture and is designed to prep skin for subsequent serums/moisturizer.

Given the large bottle and likely mass-market price, it may not have very high concentrations of each active (Vitamin C, Niacinamide) compared to premium brands — but that doesn’t mean it’s not useful.

Packaging & storage are important: with actives like Vitamin C, exposure to light/heat reduces potency.

In a hot/humid climate (Lagos), hydration and barrier recovery are very relevant concerns, so this product seems aligned with local skin needs.

why you might like it

Great if you’re looking for a hydrating toner that also offers brightening (Vitamin C) and texture/barrier improvement (Niacinamide) all in one.

Size is generous (400 ml) — good value if you’ll use it regularly.

Suitable for “all skin types” according to listings, including possibly sensitive/dehydrated skin.

The multi-layer hydration angle (5D HA) is relevant in humid climates where skin may still feel dehydrated or lose moisture due to heat/sweat.

Local availability in Nigeria and specifically Lagos means you don’t have to rely on expensive import shipping.